From my experience the large the water volume, the more stable the water parameters, which means better survival rate for shrimp. I tried keeping cherries in a 2g cookie jar and 3g bubble bowl. Kept loosing them, water changes swung parameters too much. When i tossed the last 5-7 in my husband's 12g long as food for his dwarf puffer they EXPLODED to 100-200 shrimp. Stupid puffer never saw them as a food option.
As long as your work always keeps a constant temp (doesn't turn off heat/ac during 'off hours'/holidays), and you're not near a window. I personally like to use a heater + temperature controller as an extra measure to ensure it doesn't over heat. Remember smaller volume=harder to keeps table params (this includes temp) major swings can mess them up.
Also consider a sponge filter-filtration is always good and the sponge grows yummies for the shrimp. n It deals with ammonia build up during lights out hours.
As for plants what do you plan for light? are you using liquid ferts? soil +cap substrate? enriched substrate?root tabs?
I like dwarf sag-ones established it takes over. Crypts do well after their initial melt to adapt to new tank but they're slower growers.
Italian vals are good-can trim back if they get too long, fast growing after adapted, send out lots of runners.
Water sprite you have to keep up on trimming-let mine go in the 12g and it lifted the lid a whole inch after completely filling the tank!
Moss is not as fast a grower but always good for shrimp-great place for their food to grow.
Get floaters! They help with excess nutrients a lot since they have direct access to co2 being at the surface. What kind depends on light intensity and if you have a lid (personally recommend a lid so cleaning staff doesn't get spray in the tank). I like duckweed but a lot of people don't, salvinia minima is a good one for lidded tanks. You can also float stems like anacharis or hornwort-I never have much luck with these..
Don't feel like digging up my old ooold shrimp pico photos, here are after shrimp uses of these 2-3g vases/bowls
Here is my 3g bowl after shrimp have kept a betta (1). Dwarf sag and salvinia minima. There is a sponge filter and heater, but you can't see it.
2g cookie jar after shrimp-again 1 betta, heater, filter, fissidens on dirftwood
2.5g vase with waterpsrite, anubias, betta, heater,filter
Save vase as above, vals, anubias, sponge, heater